Viral stomach infections are the most common cause of vomiting and diarrhea, according to the National Digestive Diseases Information Clearinghouse (NDDIC). Viral gastroenteritis’ main symptoms are watery diarrhea and vomiting with fever, headache, chills and abdominal pain.
The most common viral infections include adenovirus, which is most common in children under two years of age.Vomiting and diarrhea are the most common symptoms. Rotavirus causes more cases of diarrhea in children ages 3 to 15 months old and is the most common cause of diarrhea in children under 5 years of age. Symptoms of this virus include vomiting and watery diarrhea. Patients also develop abdominal pain and fever.
Astrovirus primarily infects the elderly, young children and infants and is most prevalent during winter months. Those who develop this virus come down with vomiting and diarrhea. Another viral stomach infection, calicivirus, affects people of all ages. The most common of these is the norovirus, occurring most frequently from October through April. People who are infected with norovirus develop symptoms of fatigue, headache, vomiting, diarrhea and, occasionally, muscle aches, according to the NDDIC.